Did just fine - Caldwell Ballistic Precision Chronograph

Took it out on an early, cloudy morning...used the supplied lighted sunshades...and it picked up every shot. I had bought a non-caldwell "bargain" unit online, it was all over the place with readings, and then had to buy another one...dismal at best. Should have spent the money and bought this one. It was cheaper and better in the end.
Not sure with Android phones, iPhones are not very user-friendly with the direct connection,(mine is an 8). I dug tried an old iphone 4 I had stored...but it would not let me install the app as that phone was too old. At only 10-12 feet away, it isn't too hard of a chore to write values between shots.